20140179 Rev Cmts from BCRA 10172014 � ; , �
� 2706 Paciflc Avenue,Suttn. 3qo
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October 17,2014
Karen Bennett
City of Yelm
Community Development Department
105 Yelm Avenue West
Yelm, WA 98597
Dear Karen,
Attached are our revised plans and responses to review comments provided on October 6t", 2014 by Jim
Gibson of SCJ Alliance. Please feel free to contact me if you have any questions or would like to discuss
the project further.
Water Svstem Comments
1. Fire flow calculations have not been supplied with the review material. Please provide the
calculations per the SUP approval
BCRA Response: Acknowledged,fire flow testing was provided to us by Kevin Ray on October 13,
2014 and confirmed the following;
Flowrate=1,095 GPM
Static Pressure=51 psi
Residual Pressure=45 psi
Converting this to the standard 20 psi pressure an equivalent flowrate is found
X �H \os4
R
QR — QF H��
QR = Rated Capacity at 20 psi (gpm)
QF = Total Test Flow (gpm)
NR = Static Pressure minus 20 psi (psi)
HF = Static Pressure mtinus Residual Pressure (psi)
C51 psi — 20 psi\o.s4
QR = 1,095 gpm x I = 2,658 gpm
51 psi — 45 psi/
This flow rate exceeds the flowrate required in the 1012 International Fire Code Table 8105.1 (a
type V-8 structure between 4,801 and 6,200 square feet)of�,000 gpm.
2. Under "Utility Notes" page C1.01 it states"Fire protection lines to be designed and completed
by fire protection engineer."
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BCRA Response: Acknowledged, note has been removed.
3. If fire flow cannot be provided by only fire hydrants, a fire sprinkler may be required. If this is
necessary the plans must show the fire sprinkler supply line, post indicator valve, (PIV),fire
department connection (FDC), FDC supply and a fire hydrant location for use with the FDC
connection.
BCRA Response: Adequate fire flow has been confirmed per response above.
4. The current Fire hydrant does not meet the requirements for building coverage to all parts of
the building with a maximum 150' hose pull.
BCRA Response: We will work with Gary Carlson to petition for waiver of regulation. Fire
hydrant is currently positioned such that a hose pull of 167'would be required to reach all parts
of the building.
5. Is the water main large enough to support the required fire flow requirements?Support the 6"
size with fire flow calculations.
BCRA Response: Adequate fire flow has been confirmed per response above.
Sewer Svstem Comments
1. The construction plans are vague at the connection point. It may be in conflict with existing
water supply lines, meter and back flow prevention.
BCRA Response: Acknowledged, plans have been modified to provide connection to existing
system in an area free of obstructions.
2. The service line needs to be checked for the added flows of the new service line connection.
BCRA Response: The existing service line is a 2"line, it is our opinion that this line is adequate
for connection.
3. The tank depth from rim to invert should not be more than 5 feet.This is a City policy.
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BCRA Response: Acknowledged,plans have been modified to provide adequate cover over
service line and STEP tank.
4. Typically STEP tank sizing does not allow for the reduction of tank size because of"flow
duration". By using a 3/8 flow duration reduction it appears to undersize the tank.
BCRA Response: The project is classified as a religious education facility, used on Sundays for
the duration of the religious service(approximated to be 3 hours). Under the DOE's Criteria for
Sewage Works Design (Orange BookJ the nearest facility designation would be "Schools with no
showers and with a cafeteria". This was determined to be highly conservative given the lack of a
cafeteria within the proposed structure as well as its hours of use. Given this information, we
determined that a reduction factor could be applied to negate a portion of the oversizing due to
the conservative nature of the calculations. Similarly,STEP tank performance for another STEP
tank on the project site,serving a larger demand was considered. Based on these factors we
believe, using our engineering judgment, the proposed STEP tank is appropriately sized for the
application.
5. Typical sizing should be Q=(GPD/person)(persons)(2.0 non res) Using this the flow would be
2,400 detention volume.
BCRA Response: Acknowledged, see above response.
6. If the owner has plans for future expansion or more intensive uses (more people)for this
location you may want to add additional storage to the tank.
BCRA Response: Acknowledged,see above response.
7. The City requires 24 hours of storage above the working volume.
BCRA Response: BCRA Response: Acknowledged,see above response.
8. A generator switch and receptacle is required to be installed on the control panel. See City
sewer addendum notes.
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BCRA Response: Callout has been amended to include, "Furnish and install transfer switch
model DT 323 URK as manufactured by Cutler Hammer and male plug mode170530 MBWP
manufactured by eryant."
9. A hose bib is required to be within 50 feet of the STEP tank for maintenance.
BCRA Response: A hose bib is provided near the entrance to the building, refer to MEP plans for
details.
10. City requires the standard float levels to be utilized in the STEP Tank designs. Please do not
customize the float levels for your design.
BCRA Response: STEP system report as well as details on plans have been updated to exclude
modified float elevations.
General Comments on Plans
1. Please add the survey bench mark, basis of bearings, and vertical datum to all plan sheets the
reference elevations.
BCRA Response: Acknowledged, survey information has been added to the plan sheet.
Stormwater Pollution Prevention Plan
1. City of Yelm uses 2012 DOE Stormwater Manual.All references should be changed to 2012
manual. We have reviewed the design under the 2012 manual and have no comments for
drainage system.
BCRA Response: Reference to the 2005 DDE Stormwater Manual has been updated to the 2012
DOE Stormwater Manual.
Review of the Conditions of Approval dated Au�ust 12.2014
1. Please provide an estimate of water usage.
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BCRA Response: Work to obtain this is currently in process, will be provided prior to final
approval of plans
2. A waiver of protest is required for frontage improvements.
BCRA Response: Work to obtain this is currently in process, will be provided prior to final
approval of plans
3. A detailed landscape plan needs to be reviewed by the City staff.
BCRA Response: Work to obtain this is currently in process, will be provided prior to final
approval of plans
4. Submit a fire hydrant plan consistent with Yelm Development Guide for hydrant spacing.
BCRA Response: Work to obtain this is currently being done, will be provided prior to final
approval of plans
5. Submit fire flow calculations for review.
BCRA Response: Refer to response to Water System Comment#1 for fire flow calculations.
Plan Comments
1. 2" gate valve shown but not recorded (noted).
BCRA Response: Callout has been updated to include reference to gate valve.
2. Water meter needs to be accessible 24/7 and not behind gate.
BCRA Response: Water meter has been relocated outside the gated areo, near the parking area.
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3. STEP tank needs to be moved closure to bldg. so it's not so deep. It looks over 5'from inlet I.E.
to finished grade. 3' of cover on a non-traffic rated tank is the max. per manufacturer's warranty
BCRA Response: See response to Sewer System Comment#3 above.
4. Need to verify line size at hook-up point to determine method of connection.
BCRA Response: Line size and material has been added to the plan callout.
5. Need submittals for tank and appurtenances, also include all details pertinent to this project.
BCRA Response: Details have been updated to include all pertinent details.
6. Need water spigot within 50' of farthest tank lid for maintenance.
BCRA Response: See response to Sewer System Comment#9 above.
7. Show location of pump control panel.
BCRA Response: Detail has been added to clarify location of pump control panel.
Thank you for providing us the review comments. Please feel free to contact me if there are any
questians or if there is a need to further discuss the project.
Sincerely,
���
Oct 17 2074 11:14 AM
lustin Goroch, PE
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